return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Experimental > One molecule all properties

Experimental data for H2 (Hydrogen diatomic)

22 02 02 11 45
Other names
Hydrogen; Molecular hydrogen; o-Hydrogen; p-Hydrogen; dihydrogen;
INChI INChIKey SMILES IUPAC name
InChI=1S/H2/h1H UFHFLCQGNIYNRP-UHFFFAOYSA-N [H][H] dihydrogen
State Conformation
1Σg D*H
Enthalpy of formation (Hfg), Entropy, Integrated heat capacity (0 K to 298.15 K) (HH), Heat Capacity (Cp) An error occurred on the server when processing the URL. Please contact the system administrator.

If you are the system administrator please click here to find out more about this error.

Property Value Uncertainty units Reference Comment
Hfg(298.15K) enthalpy of formation 0.00 0.00 kJ mol-1 CODATA
Hfg(0K) enthalpy of formation 0.00 0.00 kJ mol-1 CODATA
Entropy (298.15K) entropy 130.68 0.00 J K-1 mol-1 CODATA
Integrated Heat Capacity (0 to 298.15K) integrated heat capacity 8.47 0.00 kJ mol-1 CODATA